/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.be.dao.cassandra;

import com.datastax.driver.core.Session;
import com.datastax.driver.mapping.MappingManager;
import com.datastax.driver.mapping.Result;
import fj.data.Either;
import java.util.List;
import javax.annotation.PostConstruct;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.openecomp.sdc.be.resources.data.SdcSchemaFilesData;
import org.openecomp.sdc.be.resources.data.auditing.AuditingTypesConstants;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component("sdc-schema-files-cassandra-dao")
public class SdcSchemaFilesCassandraDao extends CassandraDao {

    private static Logger logger = Logger.getLogger(SdcSchemaFilesCassandraDao.class.getName());
    private SdcSchemaFilesAccessor sdcSchemaFilesAccessor;

    @Autowired
    public SdcSchemaFilesCassandraDao(CassandraClient cassandraClient) {
        super(cassandraClient);
    }

    @PostConstruct
    public void init() {
        String keyspace = AuditingTypesConstants.ARTIFACT_KEYSPACE;
        if (client.isConnected()) {
            Either<ImmutablePair<Session, MappingManager>, CassandraOperationStatus> result = client.connect(keyspace);
            if (result.isLeft()) {
                session = result.left().value().left;
                manager = result.left().value().right;
                sdcSchemaFilesAccessor = manager.createAccessor(SdcSchemaFilesAccessor.class);
                logger.info("** SdcSchemaFilesCassandraDao created");
            } else {
                logger.info("** SdcSchemaFilesCassandraDao failed");
                throw new RuntimeException("Artifact keyspace [" + keyspace + "] failed to connect with error : " + result.right().value());
            }
        } else {
            logger.info("** Cassandra client isn't connected");
            logger.info("** SdcSchemaFilesCassandraDao created, but not connected");
        }
    }

    public CassandraOperationStatus saveSchemaFile(SdcSchemaFilesData schemaFileData) {
        return client.save(schemaFileData, SdcSchemaFilesData.class, manager);
    }

    public Either<SdcSchemaFilesData, CassandraOperationStatus> getSchemaFile(String schemaFileId) {
        return client.getById(schemaFileId, SdcSchemaFilesData.class, manager);
    }

    public CassandraOperationStatus deleteSchemaFile(String schemaFileId) {
        return client.delete(schemaFileId, SdcSchemaFilesData.class, manager);
    }

    public Either<List<SdcSchemaFilesData>, CassandraOperationStatus> getSpecificSchemaFiles(String sdcreleasenum, String conformancelevel) {
        Result<SdcSchemaFilesData> specificSdcSchemaFiles = null;
        try {
            specificSdcSchemaFiles = sdcSchemaFilesAccessor.getSpecificSdcSchemaFiles(sdcreleasenum, conformancelevel);
        } catch (Exception e) {
            logger.debug("getSpecificSchemaFiles failed with exception {}", e);
            return Either.right(CassandraOperationStatus.GENERAL_ERROR);
        }
        if (specificSdcSchemaFiles == null) {
            logger.debug("not found specific SdcSchemaFiles for sdcreleasenum {}, conformancelevel {}", sdcreleasenum, conformancelevel);
            return Either.right(CassandraOperationStatus.NOT_FOUND);
        }
        List<SdcSchemaFilesData> list = specificSdcSchemaFiles.all();
        if (logger.isDebugEnabled()) {
            for (SdcSchemaFilesData esSdcSchemaFilesData : list) {
                logger.trace(esSdcSchemaFilesData.toString());
            }
        }
        return Either.left(list);
    }

    /**
     * ---------for use in JUnit only--------------- the method deletes all the tables in the audit keyspace
     *
     * @return the status of the last failed operation or ok if all the deletes were successful
     */
    public CassandraOperationStatus deleteAllArtifacts() {
        logger.info("cleaning all artifacts.");
        String query = "truncate sdcartifact.resources;";
        try {
            session.execute(query);
        } catch (Exception e) {
            logger.debug("Failed to clean artifacts", e);
            return CassandraOperationStatus.GENERAL_ERROR;
        }
        logger.info("cleaning all artifacts finished successfully.");
        return CassandraOperationStatus.OK;
    }

    /**
     * the method checks if the given table is empty in the artifact keyspace
     *
     * @param tableName the name of the table we want to check
     * @return true if the table is empty
     */
    public Either<Boolean, CassandraOperationStatus> isTableEmpty(String tableName) {
        return super.isTableEmpty(tableName);
    }
}
